Water-heater.



R. P. BA RNSTEAD.

WATER HEATER.

APPLIOATION FILED MAE. 3, 1913.

Patented Mar. 23; 1915.

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UNITED STATES PATENT @FFTQE.

ROBERT P. IB ARNSTEAD, OF BOSTON, MASSACHUSETTS.

WATER-HEATER.

To all whom it may concern:

Be it known that I, ROBERT P. BARN- STEAD, a citizen of the United States, and a resident of Boston, in the county of Suffolk .-I have devised the structure hereinafter set forth, and illustrated in the drawings forming part of this specification, of which Figure l is a side fragmentary view of apparatus embodying my invention. Fig. 2

"1 is a central vertical section of the same. Fig.

3 is ahorizontal section at wx in Fig. 2. F ig is a top view of the adjustable sleeve. Fig. 5 is a vertical section showing said sleeve in an adjusted position different from that illustrated in Fig. 2.

The water supply, coming from any suitable source, is admitted to the apparatus through the pipe 1 which is controlled both by a usual type of valve 2, and by an elbow valve 3 whose lever arm a is sufiiciently elongated and positioned to be conveniently operated by the forearm or elbow of any one desiring to be supplied with water. The gooseneck terminal 5 of said supply plpe discharges through the top of the cylindrical casing 6 into the sleeve 7 whose inner diameter is slightly greater than the outer diameter of the drum 9 located immediately below it. Steam is admitted to said drum through a supply pipe 10 terminating within said drum in the riser 11, so that the steam entering the drum through said pipe and riser is directed within the upper part thereof, and thence throughout the heater drum. I prefer to screw the lower ends of both the casing and drum into a base 12 from the lowermost point of. which passes a return pipe 13 for taking condensation back to the boiler. The water admitted through the supply pipe 1 pours into said sleeve 7, more or less filling the same, but steadily escaping through the slender annular space between said sleeve and the drum 9, and flowing in a thin film down the entire outer surface of the latter. The drum being heated by the steam to 212 or higher, it immediately raises the film of water to the boil- Specification of Letters Patent. P t t d 23, 1915.

/ Application filed March 3, 1913. Serial N 0. 751,730., 7

ing point, and the latter passes through the opening 14 to the discharge spout 15. 'For thus securing boiling water, the valve 3 is adjusted to adniit a moderate quantity only to the sleeve, so that all that escapes therefrom descends through the said annular space, and hence receives the maximum of heat. If the water is desired slightly less hot, the valve 3 is opened a trifle wider so that the said annular space ;or slit cannot dispose of it all, and more or less must overflow from the sleeve and reach the bottom of the casing and the discharge opening 14 without coming in contact with the drum 9. This cool water mixing with the boiling water which comes from the drum-surface, produces a supply whose temperature depends upon the proportion of the cool and the hot, and a proportion which can be determined by the angle of the valve arm 4, so that by opening the valve 3 to its limit, water is obtained which is far below tepid, or is even cold.

It is evident that by providing the adjacent surface of the casing 6, or any other suitable member, with indicator markings 16, or descriptive words, the approximate temperatures of Water supplied can be known.

Inasmuch as this heater and service cook is specifically designed for the clinic in hospitals, it is arranged not only to supply boiling water for sterilization purposes, and a considerable amount of warm water for washing utensils and the like, but to furnish a comparatively large quantity of sterilized tepid water 'in which the surgeons can wash their hands. For this last purpose, I form the sleeve 7 with a stepped mouth 17, whereby the lowered position of the sleeve'shown in Fig. 2 gives the thin film of water above described, while the elevated position shown in Fig. 5 delivers a thick curtain of water. Such adjustment of the sleeve 7 is provided by the hand screw 20 tapped intoa threaded socket 21 at the top of the drum 9, and loosely supporting said sleeve by means of the spokes 22 rigid with the sleeve. By turning the hand wheel 23 at the exterior of the casing 6, said screw is'raised or lowered and the sleeve shifted therewith. When the sleeve is thus elevated, the wide annular space given thereby causes so thick a water curtain to flow over the surface of the heater drum that only enough heat is received to raise the temperature to blood heat.

This apparatus is, of course, located above a suitable sink so that the doctor washes his hands in the warm water issuing thereon from the spout 15. 7

To make sure that the water overflowing from the upper edge of the sleeve shall not creep-down the side of the latter and from its lower edge pass to the hot drum 9, but instead shall flow down the inner surface of the casing 6 and through contact with such cool metal, shall receive no heat eX- cept that obtained by intermiXture with the thin film of hot water from said drum, I provide the outer surface of said sleeve with an undercut flange 25 (Figs. 2 and 5) which effectually diverts the overflow as desired.

By the intermixture of a larger volume of cold water with the small quantity at 212 from the surface of the drum, the resulting temperature would be any hot, warm or tepid supply desired, according to the volume of the cold water admitted to the heater.

What I claim as my invent-ion and for which I desire Letters Patent is as follows, to wit 1. A fluid heater comprising a heated drum, a casing inclosing the same but spaced therefrom, a sleeve located with its lower edge surrounding the upper edge of said drum but presenting a thin space between the same, and variable means for supplying water to said sleeve, whereby only enough water may be supplied to said sleeve to escape through said thin space and to be highly heated by contact with said drum, or an excessive amount may be admitted to the sleeve to escape over the top edge thereof, said edge being constructed to deliver such overflow into contact with the surface of the said casing.

2. A fluid heater comprising a heated drum, a casing inclosing the same but spaced therefrom, a sleeve located with its lower edge surrounding the upper edge of said drum but presenting a thin space between the same, and means controllable at will for delivering water into said sleeve, said sleeve having an undercut flange surrounding its upper edge for delivering an overflow from the sleeve into contact with the surface of the casing.

3. A fluid heater comprising a means of fluid supply, a drum, means for supplying a small quantity of the fluid directly to the drum, means whereby an excess of fluid is diverted from the drum, and means whereby such hot fluid and normal fluid are intermixed and delivered together.

a. A fluid heatercomprising a cylindrical drum having a drainage means at its lower end, a steam admission pipe having a vertical terminal section within said drum, the end of said section being located near the top of the drum, a cylindrical casing surrounding said drum, means for admitting fluid at the top of said casing upon said drum, means for directing the fluid down and in contact with the surface of the drum, and means for withdrawing the heated fluid from the lower part of the space between said drum and easing.

5. A fluid heater comprising a cylindrical drum internally heated, a cylindrical casing surrounding said drum, means for supplying fluid at the top of said casing and for withdrawing the same from the bottom eX- terior to said drum, a sleeve slightly larger in diameter than said drum and having an internally stepped lower edge near the top edge of said drum and concentric therewith, an internally threaded boss on said drum, a hand screw passing through the top of said casing and engaging said boss, and radial arms rigid with said sleeve loosely supported by said hand screw to turn thereon but to move up and down therewith.

In testimony that I claim the foregoing invention, I have hereunto set my hand this 24th day of February, 1913.

ROBERT P. BARNSTEAD.

Witnesses:

A. B. UPI-1AM, C. G. MUNSTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

